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Performance Comparison between Tivaware FPU library and CMSIS DSP Library for Tiva C Series

dredg dredg
Prodigy 70 points


Hello Everyone

I need a high performance floating unit instructions in my process. 

I am little confused. https://www.youtube.com/watch?v=I3ud8tIgHxo 

wonder that which one is more effective and fast for single precision FPU instructions includes float multiply, divide, sqrtf(float), fabsf(float) ....etc functions.

Regards

dredg

  • 0
    TI__Guru**** 244400 points
    Hello Dredg,

    I get the point on the requirement but not about "which one is more effective". What are the options we are discussing here?

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Guru 117855 points
    May we expand the questioning to poster's meaning of, "High Performance?"

    As youtube is the esteemed source - wouldn't such fine detail be (well) covered, there?
  • 0 in reply to Amit Ashara
    Guru 11940 points

    ... but not about "which one is more effective".

    Me neither.

    But I suggest to study the FPU-related part of the Thumb-II instruction set. Be aware that the FPU does not support transcendental functions (sin,cos, etc.) directly.

    A more precise definition of your requirements would help.

  • 0 in reply to Amit Ashara
    Prodigy 70 points

    Hello Amit

    Maybe the term "effective" is wrong in here.

    Briefly, In my application, I will use single precision floating point instructions include "multiply,divide, sqrtf, absf, FFT " functions. In this case, I am trying to understand what is the difference between Tivaware FPU library and CMSIS DSP library. And I would like to know that which library can provide me faster instruction cycles.

    I am only trying to determine which library I should use in my application.

    dredg

  • 0 in reply to dredg dredg
    Guru 11940 points

    And I would like to know that which library can provide me faster instruction cycles.

    The compiler with superior optimization capabilities.

  • 0 in reply to f. m.
    Guru 117855 points

    Might there be another point worthy of consideration? Are you going to remain forever & (only) w/one single vendor?

    CMSIS is supported by multiple vendors - usually such broad support insures superiority beyond (single) vendor effort. (i.e. compare IAR/Keil vs. vendor's CCS - the broad-based IDE's enjoy marked superiority)

    Have you searched for performance "benchmarks?" Such - if available - may solve your riddle.   (I don't know the answer so can only suggest "solution methods.")

    And - when all else fails - might you run - then compare & contrast 3-5 functions (under each lib.) "key/critical" to your (specific) needs?   This - it would seem - provides the most focused & telling insight - especially as it targets functions specific to your requirement...